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Uni-m en Sira'rns Parent @rries.

CARL THEODOR REMUS, OF DRESDEN, SAXONY, GERMANY. ASSIGNOR TO JEAN SOHERBEL, OF SAME PLACE.

DIE FOR MAKENG PAPER BOXES.

SPECIFICATION forming part of Letters Patent No. 329,080, dated October 27, .1885.

Application filed June 12, 1885. Serial No. 168,446. (No model.) Patented in England May I9, 1885, No. 6,153, and in Germany July 15, 1884, No. 30,982.

To aZZ whom it may concern.-

Be it known that I, CARL THEODOR REMUs, a subject of the Emperor of Russia, residing at the city of Dresden, in the Kingdom of Saxony, Germany, have invented certain new and useful Improvements in Dies for Making Paper Boxes, of which the following is aspecification.

This invention relates to dies for making paper boxes in which the body and cover are made of seamless bodies of considerable height; and the invention consists of a female die having a radially-grooved top surface, a ringshaped holder having a grooved under side, and a male die having a ribbed lower part and a smooth upper part.

In the accompanying drawings, Figure 1 represents a vertical central section of a paper box made by my improved dies. Figs. 2 and 3 are vertical central sections of two different sets of dies for making seamless covers and bodies for paper boxes. Figs. 4 and 6 are bottom views of the holders for the cardboard, and Fig. 5 is a diagram showing the position of the grooved holder to the grooved top surface of the female die.

Similar letters of reference indicate corresponding parts.

6 in the drawings represents the male die, which is made either of round, square, or oblong shape, according to the shape of the box that is desired to be produced. The male die e is provided at the lower part with ribs in the nature of saw-teeth, which ribs extend in round dies around the same, while in square or oblong dies they are arranged at the rounded-off corners of the same.

a is the female die, which is provided at its top surface with radial grooves a, as shown in Figs. 2 and 3. On the female die a rests a ring-shaped holder, d, that is grooved at the under side, the grooves d extending in round holders around the same, as shown in Fig. 4., while in oblong forms of holders the radial grooves are arranged only at the corners, as

shown in Fig. 6. The relative position of the holder to the grooved top surface of the female die a is shown in Fig. 5, and is such that the raised portions of the grooved parts are adjacent to and vertically above each other.

The cardboard interposed between the female die a and the holder d is guided by the raised portions of said parts, whereby the friction of the board with these parts is diminished when the board is drawn into the female die a by the descent of the male die 6. The grooves a and d also prevent any lateral shifting of the card-board, so that only folds of uniform size and at regular distance from each other are formed, as the card-board can be drawn in to a considerably greater depth than heretofore. Paper boxes with seamless bodies of considerably greater depth can thus be made which could-not be produced with the smooth dies and holders heretofore in use.

In oblong boxes with rounded-off corners 6 the dies are provided with radial grooves at the corners, the grooves being extended to some distance at both sides of the corners and made to diverge slightly, as shown in Fig. 6. By this arrangement of the grooves the crowdin g of the cardboard at the upper higher parts of the rounded-off body or cover isprevented, and the stock crowded somewhat from the areshaped corners toward the smooth parts of the box-sections. When the card-board,which is held between the female die and the holder, is acted upon by the male die, itis drawn into the female die and successively taken hold of by the teeth of the male die, whereby the bottom of the box-section is relieved from the strain, the tearing of the bottom owing to a too great strain exerted thereon by dies is prevented, and thereby a main objection to making boxsections of great height from card-board overcome. Another objection to the successful 8 drawing of such box-sections consists in the formation of uneven folds or in the irregular crowding of the folds,whereby defective boxes are obtained,which latter objection is remedied by the grooved top surface of the female 0 die and the grooved holder.

The female die is made of extra depth, so that the card-board from which the box-section is made is drawn down in the female die for a considerable distance after it has been shaped until it arrives at thebottom of the die. The downward motion of the card-board into the female die a by the male die serves not only to press the boxsection into shape, but also to polish the outer surface of the same, so as to impart a finished appearance to the boxsection.

5 The edges of the box-sections are re-enforced by sheet-metal rims, which are lapped over and clamped to the edges, so that a paper box with seamless sections of considerable strength is obtained.

10 Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. The combination of a female die having a grooved top surface, a ring-shaped holder having a grooved under side, and a ribbed 15 male die, substantially as set forth.

2. The combination of a female die having CARL THEODOR REMUS.

Witnesses PAUL DRUoKMiiLLER, CARL SoHRoDER. 

